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	<h3>Sudoku Puzzle (.sdk) file format</h3>
	<a href="http://www.sudocue.net/fileformats.php">Sudo file formats</a>
	<p>The file contains 9 lines, reach representing a row in the
		puzzle. Empty cells are represented by a dot. Additional information
		is optionally present in separate lines, starting with a hash
		character, followed by a single letter that identifies the type of
		info:</p>
<pre> 
A = Author
D = Description
C = Comment
B = Date published
S = Source (name of newspaper, book or website)
L = Level
U = Source URL
</pre>
	<p>These additional lines are only recognized by SudoCue. Sadman
		sudoku also uses this format, but it does not recognize these entries.
	</p>
	<p>An example:</p>
<pre>
#ARuud
#DA random puzzle created by SudoCue
#CJust start plugging in the numbers
#B03-08-2006
#SSudoCue
#LEasy
#Uhttp://www.sudocue.net/
2..1.5..3
.54...71.
.1.2.3.8.
6.28.73.4
.........
1.53.98.6
.2.7.1.6.
.81...24.
7..4.2..1
</pre>
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